import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;

public class ThreadDemo8 {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        Callable<Integer> callable=new Callable<Integer>(){
            @Override
            public Integer call() throws Exception {
                int result=0;
                for(int i=1;i<=100;i++){
                    result+=i;
                }
                return result;
            }
        };

        FutureTask<Integer> futureTask=new FutureTask<>(callable);
        Thread t=new Thread(futureTask);
        t.start();
        //futureTask具有阻塞功能，在线程没有执行完之前，此处不会打印
        //不需要写join
        System.out.println(futureTask.get());
    }
}
